The RCA Unison U1000 U1100 4-Line Base + Wireless Deskset is a versatile cordless telephone system with 4 phone lines and a conference call capability for up to 6-way conversations. This wireless deskphone set includes a phone desk and features a 3.4-inch display, speakerphone functionality, and caller identification. Made by RCA, this black plastic telephone set has a DECT6.0 handset frequency and operates on a corded electric power source. With its multiple-line operation and standard packaging, this cordless telephone system is ideal for home or office use.